Search History Select to load keywords (type equals "Thesis") AND (dateIssued equals "[1957 TO 1999]") AND (subject equals "Polyethylene") AND (subject equals "Copolymers") AND (dateIssued equals "1999") (type equals "Thesis") AND (dateIssued equals "[1957 TO 1999]") AND (dateIssued equals "[1990 TO 1999]") AND (subject equals "โพลิเมอไรเซชัน") AND (author equals "Attawut Kumkrong")
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